Chart of the Week (Platforms)

Hey look! The fastest rising commerce apps are all platforms. Shocker. Offerup is a local marketplace for used goods. Letgo is a, uh, local marketplace for used goods. Wish is a, hmmm, marketplace for used goods. Flipp is a platform linking brick-and-mortar ad circulars to end user consumers and Venmo is, obvi, a payment platform that you should've hear…